Addiction and mental health services and systems research; Harm-reduction approach; screening, assessment, and treatment of the comorbidity/co-occurrence of mental health and substance use disorders (particularly among children, adolescents, and young adults); implementation science and the use of evidence in treatment systems; mental health and wellness service-system improvements for Indigenous Peoples of Canada; cultural adaptation of evidence-based practices; goal theory; mindfulness-based interventions; research and publication ethics.